ac代码参考一下：
```c
#include<bits/stdc++.h>
#include <bits/stdc++.h>
using namespace std;
int s,v,h,m,zsj,sd;
int main(){
cin>>s>>v;
sd=ceil((double)s/(double)v);
zsj=8*60+24*60-ceil(sd)-10;
h=zsj/60%24;
m=zsj%60;
if(h<10&&m<10) cout<<0<<h<<":"<<0<<m;
if(h<10&&m>=10) cout<<0<<h<<":"<<m;
if(h>=10&&m<10) cout<<h<<":"<<m;
if(h>=10&&m>=10) cout<<h<<":"<<m;
return 0;
}
```
by dsfgsdf @ 2023-07-14 17:28:08
@[aikyon_lz2022](/user/763794) 你的11.12.13.14行代码，可能不对，只要在判断小时的时候%24就能解决提前出发的问题了！
by dsfgsdf @ 2023-07-14 17:34:49
@[lfxxzms](/user/1003851) 谢谢
by aikyon_lz2022 @ 2023-07-14 20:28:05